BISWAS, N. N. <br/><br/>
PRINCIPLES OF TELEPHONY. 

 -  1998 
 - BANGALORE  RADIANT BOOKS 
 - 136 
<br/><br/><label>Subjects--Topical Terms: </label><br/>  TELEPHONY
<br/><br/><label>Dewey Class. No.: </label>621.385.385  / BIS